The small partners in the laboratory must be familiar with the pipette, and the suction heads used are also countless, and we should consider many factors when buying the pipette, such as accuracy, feel, brand, and the fit of the suction head. However, when choosing the suction head, it is not so important, in fact, the quality of the suction head will have a small impact on the accuracy of the pipette. Do you know how to quickly judge the quality of the suction head?

Here are a few tips

1. Look at the material

The suction heads on the market are basically made of polypropylene plastic (PP), with high chemical inertness and a wide range of temperature, which can ensure chemical compatibility and avoid dissolution. However, the same polypropylene, the quality difference will be very large: high-quality suction heads are generally made of natural polypropylene, while cheap suction heads are likely to be recycled polypropylene plastic.

2. Look at appearance

Good quality suction head appearance level is also very high, at a glance, the surface of the suction head is smooth, there is no burr flash, and the shape is uniform and straight and not curved, representing the taper and concentricity of the suction head are very good, better matching with the pipette gun, and better air tightness, making the pipette more accurate.